add 'pull_request' to the ns_test and sbt_test workflow triggers (#866)

* add 'pull_request' to the ns_test and sbt_test workflow triggers

* reduce the amount of duplicate tests

* Apply suggestion from @rcannood

Co-authored-by: Robrecht Cannoodt <robrecht@data-intuitive.com>

* Apply suggestion from @rcannood

Co-authored-by: Robrecht Cannoodt <robrecht@data-intuitive.com>

---------

Co-authored-by: Robrecht Cannoodt <robrecht@data-intuitive.com>

Author: hcannoodt

.github/workflows/ns_test.yml

@@ -1,6 +1,11 @@
 name: ns test
 
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - 'develop_**'
 
 jobs:
   ns-test:

.github/workflows/sbt_test.yml

@@ -1,6 +1,11 @@
 name: Scala CI
 
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - 'develop_**'
 
 jobs:
   scala-ci: